I'm looking into calling PDFium from Pharo via FFI. Currently I'm stalled a bit since it doesn't have a shared-library target.
If you consider access to such a library would be useful to the community, please take a few moments to star this issue... https://bugs.chromium.org/p/pdfium/issues/detail?id=826 cheers -ben P.S. Can anyone comment on calling into a static library via FFI? On Wed, Oct 11, 2017 at 2:05 PM, Ben Coman <b...@openinworld.com> wrote: > > > On Wed, Oct 11, 2017 at 2:03 PM, Ben Coman <b...@openinworld.com> wrote: > >> >> > On Tue, Oct 10, 2017 at 8:58 PM, Manuel Leuenberger >> > <leuenber...@inf.unibe.ch> wrote: >> > > Hi, >> > > >> > > I want to view a PDF within Pharo. I found that Athens has a PDF >> canvas, but I have no idea how to use it. Is there a way to view a PDF >> within Pharo, so that I can scroll, zoom, click links etc. in the PDF? >> > > >> > > Cheers, >> > > Manuel >> >> >> On Wed, Oct 11, 2017 at 3:04 AM, Stephane Ducasse < >> stepharo.s...@gmail.com> wrote: >> > >> > Hi manuel >> > >> > So far I do not know if we have this is Pharo. >> > I imagine that we would have to build a renderer once we will have the >> > PDF reader from Christian library. >> > >> > Stef >> >> > [Edit: Update license link] > > >> A renderer will have great synergy with PDFTalk, but I think a proof of >> concept can be done independently. >> I've been poking at this topic for a while looking for options. >> Coincidentally a couple of days I discovered the PDFium library. >> I haven't had time yet to give it a run, but it seems a good candidate >> since... >> * Its a successful commercial product by Foxit built into Chrome >> converted to open source with Google's backing for use in Chromium >> https://www.foxitsoftware.com/company/press.php?id=305 >> * Its license is BSD style >> *https://github.com/hfiguiere/pdfium/blob/master/LICENSE >> <https://github.com/hfiguiere/pdfium/blob/master/LICENSE>* >> * Although written in C++ it has a C interface >> https://github.com/hfiguiere/pdfium/blob/master/public/fpdfview.h >> * Search here on " Function: " to skim through >> * Proof of concept seems to only need these key functions... >> * void FPDF_RenderPageBitmap( FPDF_BITMAP bitmap,FPDF_PAGE >> page, ... ) >> * FPDF_BITMAP FPDFBitmap_Create( int width, int height, int >> alpha); >> * FPDF_PAGE FPDF_LoadPage ( FPDF_DOCUMENT document, int >> page_index ) >> * FPDF_DOCUMENT FPDF_LoadMemDocument ( const void* data_buf >> ... ) >> * void FPDF_InitLibrary () >> * Has a concise getting started for POC... >> https://github.com/hfiguiere/pdfium/blob/master/docs/getting >> -started.md >> * Maybe useful fork with V8 disabled by default >> https://github.com/klokantech/pdfium >> * Master repo here >> https://pdfium.googlesource.com/pdfium/ >> >> So Pharo might load a PDF file into a ByteArray, pass that to >> FPDF_LoadMemDocument() & FPDF_LoadPage(), >> then get a bitmap back from FPDFBitmap_Create() & FPDF_RenderPageBitmap() >> and display the result in a Pharo window. >> >> The rest of this week I'm working 12 hour days on a mine site. I could >> try it out once I'm home, but in the meantime is anyone else keen to try >> it? >> >> cheers -ben >> > >
